Mineral Like Byproduct (Technogenic)

Mica Schist

Mica Schist

Azurite with Malachite and Limonite

Azurite Cu3(CO3)2(OH)2 / Malachite Cu2CO3(OH)2

Moss Agate

Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide

Ruby in Matrix

Corundum (Al2O3)

Granite

Phaneritic Felsic Igneous Rock

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a nodule

Sandstone (Red Sandstone / River Stone)

Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)

Amazonite

Potassium Feldspar (KAlSi3O8)

Nuummite

Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)

Manganese Ore (Psilomelane/Pyrolusite)

Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)

Chert (Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides

Olivine (Peridot)

Olivine Group (Mg,Fe)2SiO4

Quartz Druzy on Matrix (with Copper Mineralization)

Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Native Gold Nuggets

Native Gold (Au)

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Kyanite in Quartz

Al2SiO5 in SiO2

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Schist

Mica Schist

Hypersthene

Hypersthene (formula: (Mg,Fe)SiO3)

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Sandstone (likely Quartz Sandstone)

Arenite (composed primarily of SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Kyawthuite

Kyawthuite (Bi3+Sb5+O4)

Tourmalinated Quartz

Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)

Sandstone or Mudstone with Iron Staining

Ferruginous Sandstone/Mudstone

Orthoclase Feldspar (Twinning Specimen)

Orthoclase (KAlSi3O8)

Pyrite and Fluorite on Quartz (Matrix Specimen)

Iron Disulfide (FeS2) and Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Tiger's Eye

Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Sandstone with Foliose Lichen

Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Sandstone (Pebble)

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)